Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05ce65f4563c15b…

MALICIOUS

PDF

39.5 KB Created: 2020-03-25 06:38:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: fad82f1a08a5d3fc24e9fcdd73c721fc SHA-1: 5a12659252894c4e93ef6bdbea7536b925099f83 SHA-256: b05ce65f4563c15b3ee5aadfee8f59e2a0bf59d6e5bc5134d2adca4d79bfe5f4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are numerically or generically named PDFs, suggesting a link farm designed to attract search engine traffic. One of these links, http://cityonloc.com/uploads/1/3/1/0/131070096/131070096.html#age+of+empires+2+portable+windows+10, is directly embedded in the document body. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, and the presence of a 'Download Button' heuristic suggests a lure for users to click these links. The overall pattern points to a malicious SEO-driven distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cityonloc.com/uploads/1/3/1/0/131070096/131070096.html#age+of+empires+2+portable+windows+10 PDF link annotation
    • http://vangoldenprinting.com/uploads/1/3/0/5/130543155/87195.pdfIn PDF document text
    • http://maryandtuxbridal.com/uploads/1/3/0/2/130271028/periziwadurisaxitaza.pdfIn PDF document text
    • http://electdavidharris.com/uploads/1/3/0/3/130379294/dexafejufabodix-dezumufat.pdfIn PDF document text
    • http://melanieseddon.com/uploads/1/3/0/6/130621354/vijapozofexetof.pdfIn PDF document text
    • http://mail.customlivingconstruction.com/uploads/1/3/0/3/130379133/2660391.pdfIn PDF document text
    • http://seodublin.org/uploads/1/3/0/5/130543941/duditilogug-vadivef-sedefosutiz-magixuje.pdfIn PDF document text
    • http://comocriarsite.pt/uploads/1/3/0/2/130289475/194d59978.pdfIn PDF document text
    • http://server1.projcentral.co/uploads/1/3/0/5/130547450/6178536.pdfIn PDF document text
    • http://www.cairokhanhotel.net/uploads/1/3/0/3/130324440/1307897.pdfIn PDF document text
    • http://mybabyluvz.com/uploads/1/3/0/3/130313488/mudepupajem.pdfIn PDF document text
    • http://weboughtagun.com/uploads/1/3/0/6/130621060/newirula-tuvedunoruxa.pdfIn PDF document text
    • http://grayhawkdentalassociates.com/uploads/1/3/0/5/130551556/vowarago-wosuzudug-dunopi-xamurosefipuz.pdfIn PDF document text
    • http://hostmaster.cerocblaze.com/uploads/1/3/0/7/130776343/wotapamozizomipixaf.pdfIn PDF document text
    • http://smashvb.com/uploads/1/3/0/7/130740517/a1853e8.pdfIn PDF document text
    • http://pocketbricks.com/uploads/1/3/0/4/130476091/6922262.pdfIn PDF document text
    • http://reclaimyourspaceandlife.com/uploads/1/3/0/6/130603684/denibojowijim-lexonaj-nutizitalowunu-nafolin.pdfIn PDF document text
    • http://ramadanbar.com/uploads/1/3/1/1/131164313/3550493.pdfIn PDF document text
    • http://www.king-g.com/uploads/1/3/0/2/130289238/damisatuje.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D1 8180 bytes
SHA-256: f68435c24bb606731be058ddef9e09e5413adac4410c021a59e34c7c603e5375

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